Method for increasing thickness of non-woven fabric and apparatus for implementing the same
a non-woven fabric and thickness technology, applied in lighting and heating apparatus, drying machines with progressive movements, spraying/projecting, etc., can solve the problems of long time-consuming and laborious, thin non-woven fabrics made of thermoplastic synthetic fibers, and reduce the thickness of non-woven fabrics in the thickness direction, so as to achieve the effect of significantly improving the efficiency of the first jet stream of hot gas
Inactive Publication Date: 2014-05-13
UNI CHARM CORP
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Benefits of technology
The present invention provides a method and apparatus for heating non-woven fabric using hot gas. The first jet streams of hot gas are applied to the fabric in one direction and are then diverted so that the reflected jet streams of hot gas can further heat the fabric. This improves the utilization efficiency of the first jet streams of hot gas and ensures even heating of the fabric. The apparatus includes a first jet nozzle and a second jet nozzle which create collision with each other, allowing for diversion of the first jet streams and further heating of the fabric. This invention offers an efficient and effective way to heat non-woven fabric.
Problems solved by technology
It is well known that bulky non-woven fabrics made of thermoplastic synthetic fibers have their thickness decreased under a load in a thickness direction for a long period.
Method used
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[0041]Details of the present invention relating to a method and an apparatus for increasing a thickness of a non-woven fabric will be more fully understood from the description given hereunder with reference to the accompanying drawings.
[0042]FIG. 1 is a diagram exemplarily illustrating a process of heat-treatment of a non-woven fabric by using a method and an apparatus according to the present invention. On the left hand in FIG. 1, there is a web of non-woven fabric 1 prepared in the form of a roll 2 and, from this roil 2, the non-woven fabric 1 is continuously drawn forth in a machine direction MI) by first and second nip roil pairs 6, 7 cooperating with first and second feed rolls 8, 3 and the other feed rolls optionally used with these rolls 6, 7, 8, 9. After having passed through the first nip roll pair 6, the non-woven fabric 1 is introduced into a heat-treatment chamber 11 illustrated in FIG. 1 as partially cutaway. The heat-treatment chamber 11 has an inlet 11a and an outlet...
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Abstract
The present invention utilizes jet streams of hot gas at a high efficiency and thereby to increase a bulk of non-woven fabric. Non-woven fabric containing thermoplastic synthetic fibers is subjected to jet streams of hot gas in a thickness direction of the non-woven fabric. A temperature of the jet streams of hot gas used for this process is set to a level lower than the temperature at which a resinous ingredient forming the surface of the thermoplastic begins to be melted. The jet streams of hot gas are directed to penetrate fiber interstices in the non-woven fabric and then to strike on a means serving to divert the jet streams of hot gas.
Description
RELATED APPLICATIONS[0001]The present application is national phase of PCT / JP2009 / 067975 filed Oct. 19, 2009, and claims priority from, Japanese Application Number 2008-269524, filed Oct. 20, 2008.[0002]1. Technical Field[0003]The present invention relates to methods and apparatuses adapted to apply jet streams of hot gas to a non-woven fabric and thereby to increase a thickness of the non-woven fabric.[0004]2 . Related Art[0005]It is well known that bulky non-woven fabrics made of thermoplastic synthetic fibers have their thickness decreased under a load in a thickness direction for a long period. It is also well known that such a non-woven fabric having the decreased thickness may be heated by, for example, applying hot gas such as hot air to this non-woven fabric to increase or recover its thickness. Recovery of the thickness may be generally referred to as recovery of bulk of the non-woven fabric.[0006]For example, JP 2003-339761 A (PATENT DOCUMENT 1) discloses a method accordin...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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IPC IPC(8): D06B1/02D06C7/00D04H1/498D04H1/50
CPCD06C7/00D04H1/498D04H1/50D06C29/00
Inventor TAKAHASHI, TATSUO
Owner UNI CHARM CORP